Darton M.I.D. Block Sleeves 90mm Bore

The Brian Crower BC8030 Darton M.I.D. Block Sleeve Kit is a foundational performance upgrade for the Toyota/Scion 2AZFE engine, transforming a standard 88.5mm bore block into one capable of sustaining a 90mm bore. This kit provides the structural integrity necessary for high-horsepower, high-stress applications, including forced induction, high-compression naturally aspirated builds, or professional race engines. Utilizing Darton’s Modular Integrated Deck (M.I.D.) technology, these sleeves feature a precision-machined top flange that registers on the block's deck surface. This interlocked interface prevents sleeve movement and sinking under extreme pressure and enhances heat transfer to the coolant jackets. The centrifugally cast ductile iron material offers superior strength, thermal conductivity, and wear resistance compared to stock castings or lesser alternatives, ensuring the critical interference fit is maintained across a wide operating temperature range. Installation of the BC8030 sleeve kit requires professional machining, including precision boring, deck counterbore machining, controlled thermal processes for press-fit installation, and a final hone to achieve the target 90mm bore with perfect geometry. The performance guarantee is wholly dependent on the quality of the machine work. This sleeve kit is specifically designed for the Toyota/Scion 2AZFE engine family, compatible with Scion tC (2005-2010) and Toyota Camry (2002-2006), RAV4 (2001-2005), and Highlander (2001-2007). It is valid for all production years of the 2AZFE engine and is essential for builds aiming for displacement beyond 2.4L, repairing damaged cylinder walls, or preparing for extreme forced induction, with the potential to support four-digit horsepower figures.